School: a monthly record of educational thought and progress . given by the position of the inkpot on thetable or of the gas-bracket on the wall, &c. Useful illustrations from geography come in imme-diately. It is not necessary to do more than mentionlongitude and latitude, and half-mile or other squares used on maps of towns. We may now proceed to exercises on the areas oftrapezoids and hence of triangles, employing in manyspecial cases the method by sum and difference oftrapezoids by which the general formula is , the possibility of noting the course of a brookor any other irreg
School: a monthly record of educational thought and progress . given by the position of the inkpot on thetable or of the gas-bracket on the wall, &c. Useful illustrations from geography come in imme-diately. It is not necessary to do more than mentionlongitude and latitude, and half-mile or other squares used on maps of towns. We may now proceed to exercises on the areas oftrapezoids and hence of triangles, employing in manyspecial cases the method by sum and difference oftrapezoids by which the general formula is , the possibility of noting the course of a brookor any other irregular outline having been pointed out,we get easy exercises on land surveying and at the sametime some notions likely to render that of a graph moreeasily conceived. There are also opportunities forexperimental work of a more interesting character thanmuch of what sometimes goes under that name in apply-ing the problems and theorems on area already wellknown, to obtaining numerical results which can becompared with those obtained by the To take a simple case. Having found the area of thetriangle ABC (Fig. i) by the trapezoidal method, thestudent may be shown—or, better still, may be led todeduce for himself—that it should be half that of therectangle HKML, whose length and breadth may beread off and thus check the result obtained by thetrapezoidal method.
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Keywords: ., bookcentury1900, bookdecade1900, bookidschoo, bookpublisherlondon
